Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König
Ocean acidification poses a serious threat to a broad suite of calcifying organisms. Scleractinian corals and cal- careous algae that occupy shallow, tropical waters are vulnerable to global changes in ocean chemistry be- cause they already are subject to stressful and variable carbon dynamics at th...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Language: | English |
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Online Access: | http://aquaticcommons.org/20862/ http://aquaticcommons.org/20862/1/Barry_et_al_2013_Halimeda_dynamics.pdf |
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ftaquaticcommons:oai:generic.eprints.org:20862 2023-05-15T17:51:57+02:00 Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König Barry, S.C. Frazer, T.K. Jacoby, C.A. 2013 application/pdf http://aquaticcommons.org/20862/ http://aquaticcommons.org/20862/1/Barry_et_al_2013_Halimeda_dynamics.pdf en eng http://aquaticcommons.org/20862/1/Barry_et_al_2013_Halimeda_dynamics.pdf Barry, S.C. and Frazer, T.K. and Jacoby, C.A. (2013) Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König. Journal of Experimental Marine Biology and Ecology, 444, pp. 73-80. 10.1016/j.jembe.2013.03.012 <http://doi.org/10.1016/j.jembe.2013.03.012> Biology Chemistry Ecology Environment Article PeerReviewed 2013 ftaquaticcommons https://doi.org/10.1016/j.jembe.2013.03.012 2020-02-27T09:29:50Z Ocean acidification poses a serious threat to a broad suite of calcifying organisms. Scleractinian corals and cal- careous algae that occupy shallow, tropical waters are vulnerable to global changes in ocean chemistry be- cause they already are subject to stressful and variable carbon dynamics at the local scale. For example, net heterotrophy increases carbon dioxide concentrations, and pH varies with diurnal fluctuations in photosyn- thesis and respiration. Few researchers, however, have investigated the possibility that carbon dioxide con- sumption during photosynthesis by non-calcifying photoautotrophs, such as seagrasses, can ameliorate deleterious effects of ocean acidi fi cation on sympatric calcareous algae. Naturally occurring variations in the density of seagrasses and associated calcareous algae provide an ecologically relevant test of the hypoth- esis that diel fl uctuations in water chemistry driven by cycles of photosynthesis and respiration within seagrass beds create microenvironments that enhance macroalgal calci fi cation. In Grape Tree Bay off Little Cayman Island BWI, we quanti fi ed net production and characterized calci fi cation for thalli of the calcareous green alga Halimeda incrassata growing within beds of Thalassia testudinum with varying shoot densities. Re- sults indicated that individual H . incrassata thalli were ~6% more calci fi ed in dense seagrass beds. On an areal basis, however, far more calcium carbonate was produced by H . incrassata in areas where seagrasses were less dense due to higher rates of production. In addition, diel pH regimes in vegetated and unvegetated areas within the lagoon were not signi fi cantly different, suggesting a high degree of water exchange and mixing throughout the lagoon. These results suggest that, especially in well-mixed lagoons, carbonate pro- duction by calcareous algae may be more related to biotic interactions between seagrasses and calcareous algae than to seagrass-mediated changes in local water chemistry. Article in Journal/Newspaper Ocean acidification International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons Journal of Experimental Marine Biology and Ecology 444 73 80 |
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Open Polar |
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International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons |
op_collection_id |
ftaquaticcommons |
language |
English |
topic |
Biology Chemistry Ecology Environment |
spellingShingle |
Biology Chemistry Ecology Environment Barry, S.C. Frazer, T.K. Jacoby, C.A. Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König |
topic_facet |
Biology Chemistry Ecology Environment |
description |
Ocean acidification poses a serious threat to a broad suite of calcifying organisms. Scleractinian corals and cal- careous algae that occupy shallow, tropical waters are vulnerable to global changes in ocean chemistry be- cause they already are subject to stressful and variable carbon dynamics at the local scale. For example, net heterotrophy increases carbon dioxide concentrations, and pH varies with diurnal fluctuations in photosyn- thesis and respiration. Few researchers, however, have investigated the possibility that carbon dioxide con- sumption during photosynthesis by non-calcifying photoautotrophs, such as seagrasses, can ameliorate deleterious effects of ocean acidi fi cation on sympatric calcareous algae. Naturally occurring variations in the density of seagrasses and associated calcareous algae provide an ecologically relevant test of the hypoth- esis that diel fl uctuations in water chemistry driven by cycles of photosynthesis and respiration within seagrass beds create microenvironments that enhance macroalgal calci fi cation. In Grape Tree Bay off Little Cayman Island BWI, we quanti fi ed net production and characterized calci fi cation for thalli of the calcareous green alga Halimeda incrassata growing within beds of Thalassia testudinum with varying shoot densities. Re- sults indicated that individual H . incrassata thalli were ~6% more calci fi ed in dense seagrass beds. On an areal basis, however, far more calcium carbonate was produced by H . incrassata in areas where seagrasses were less dense due to higher rates of production. In addition, diel pH regimes in vegetated and unvegetated areas within the lagoon were not signi fi cantly different, suggesting a high degree of water exchange and mixing throughout the lagoon. These results suggest that, especially in well-mixed lagoons, carbonate pro- duction by calcareous algae may be more related to biotic interactions between seagrasses and calcareous algae than to seagrass-mediated changes in local water chemistry. |
format |
Article in Journal/Newspaper |
author |
Barry, S.C. Frazer, T.K. Jacoby, C.A. |
author_facet |
Barry, S.C. Frazer, T.K. Jacoby, C.A. |
author_sort |
Barry, S.C. |
title |
Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König |
title_short |
Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König |
title_full |
Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König |
title_fullStr |
Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König |
title_full_unstemmed |
Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König |
title_sort |
production and carbonate dynamics of halimeda incrassata (ellis)lamouroux altered by thalassia testudinum banks and soland ex könig |
publishDate |
2013 |
url |
http://aquaticcommons.org/20862/ http://aquaticcommons.org/20862/1/Barry_et_al_2013_Halimeda_dynamics.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://aquaticcommons.org/20862/1/Barry_et_al_2013_Halimeda_dynamics.pdf Barry, S.C. and Frazer, T.K. and Jacoby, C.A. (2013) Production and carbonate dynamics of Halimeda incrassata (Ellis)Lamouroux altered by Thalassia testudinum Banks and Soland ex König. Journal of Experimental Marine Biology and Ecology, 444, pp. 73-80. 10.1016/j.jembe.2013.03.012 <http://doi.org/10.1016/j.jembe.2013.03.012> |
op_doi |
https://doi.org/10.1016/j.jembe.2013.03.012 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
444 |
container_start_page |
73 |
op_container_end_page |
80 |
_version_ |
1766159250377146368 |